WATCH: What 47 Senators Just Did Could Throw A HUGE Wrench Into Obama’s Big Plan

Less than a week after Israeli Prime Minister Benjamin Netanyahu swatted a political hornets’ nest with his address to Congress in which he called the Obama administration’s emerging nuclear arrangement with Iran a “very bad deal” that “paves the way” to their getting the bomb, here comes another “bomb” of sorts from Senate Republicans.

Pushing back hard against the Obama administration, forty-seven GOP senators have signed an open letter to the Iranian regime offering a lesson in how the U.S. system of government functions under the Constitution. The letter advises Iran that any deal concerning Tehran’s nuclear program that President Obama agrees to without Senate consent could die when Obama leaves office.

As The Hill reports, the letter that was spearheaded by freshman Senator Tom Cotton of Arkansas advises the Iranians that “anything not approved by Congress is a mere executive agreement” — an agreement that could well be changed or voided altogether when there’s a new executive in the White House.

“The next president could revoke such an executive agreement with the stroke of a pen and future Congresses could modify the terms of the agreement at any time,” they wrote.

It wasn’t just newcomers to the upper chamber who signed the letter to Iran. Adding their signatures to the document were Majority Leader Mitch McConnell and, according to The Hill article: “It was also signed by four Republicans who are said to be considering a run for president: Sen. Marco Rubio (Fla.), Sen. Rand Paul (Ky.), Sen. Ted Cruz (Texas) and Sen. Lindsey Graham (S.C.).”

And as The Times of Israel notes, the GOP Senators’ letter is not just an advisory to Tehran, it is also a strong message to the White House.

“…the latest effort to pressure the Obama administration into granting Congress some oversight over the nuclear negotiations and emerging agreement….”

By clicking on the video above, you can see the Fox News interview with the letter’s primary author, Sen. Tom Cotton, who also explains to Brian Kilmeade why he believes Iran is a far greater threat than ISIS is to America and the rest of the free world.